Former U.S. President Barack Obama and former First Lady Michelle Obama addressed Democrats in their home city of Chicago, saying Vice President Kamala Harris is the right choice to win the U.S. presidential election this November. The resurgence of mpox has health officials worldwide on high alert, and a World Health Organization official says they are working to obtain vaccines for those who need it in African nations, especially health workers and families of patients. Foreign residents are fleeing several townships in Johannesburg, South Africa’s largest city, as community organizations force them to close their businesses.